International Federation of the Phonographic Industry (IFPI), Recording Industry in Numbers 2008.

The Definitive Source Of Global Music Market Information.
London: The Design & Advertising Resource, 2008.

In englischer Sprache

International Federation of the Phonographic Industry (IFPI), Recording Industry in Numbers 2007.

The Definitive Source Of Global Music Market Information.
London: The Design & Advertising Resource, 2007.

In englischer Sprache

International Federation of the Phonographic Industry (IFPI), Global Recording Industry in Numbers 2006.

The Definitive Source Of Global Music Market Information.
London: The Design & Advertising Resource, 2006.

In englischer Sprache

International Federation of the Phonographic Industry (IFPI), The Recording Industry in Numbers 2005.

The Definitive Source Of Global Music Market Information.
London: Design & Advertising Resource, 2005.

In englischer Sprache